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part a: explain why the x-coordinates of the points where the graphs of the equations y = 4−x and y = 2−x+1 intersect are the solutions of the equation 4−x = 2−x+1. (4 points)

part b: make tables to find the solution to 4−x = 2−x+1. take the integer values of x between −2 and 2. (4 points)

part c: how can you solve the equation 4−x = 2−x+1 graphically? (2 points)